Modelica.Electrical.Machines.BasicMachines.DCMachines

Models of DC machines

Information

This package contains models of DC machines:

DC_PermanentMagnet: DC machine with permanent magnet excitation
DC_ElectricalExcited: DC machine with electrical shunt or separate excitation
DC_SeriesExcited: DC machine with series excitation

Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).

Package Content

Name Description

DC_PermanentMagnet Permanent magnet DC machine

DC_ElectricalExcited Electrical shunt/separate excited linear DC machine

DC_SeriesExcited Series excited linear DC machine

Name	Description
DC_PermanentMagnet	Permanent magnet DC machine
DC_ElectricalExcited	Electrical shunt/separate excited linear DC machine
DC_SeriesExcited	Series excited linear DC machine

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_PermanentMagnet

Permanent magnet DC machine

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_PermanentMagnet

Information

Model of a DC Machine with permanent magnets.
Armature resistance and inductance are modeled directly after the armature pins, then using a AirGapDC model. Permanent magnet excitation is modelled by a constant equivalent excitation current feeding AirGapDC. The machine models take the following loss effects into account:

heat losses in the temperature dependent armature winding resistance
brush losses in the armature circuit
friction losses
core losses (only eddy current losses, no hysteresis losses)
stray load losses

No saturation is modelled.
Default values for machine's parameters (a realistic example) are:

stator's moment of inertia 0.29 kg.m2

rotor's moment of inertia 0.15 kg.m2

nominal armature voltage 100 V

nominal armature current 100 A

nominal speed 1425 rpm

nominal torque 63.66 Nm

nominal mechanical output 9.5 kW

efficiency 95.0 %

armature resistance 0.05 Ohm at reference temperature

reference temperature TaRef 20 °C

temperature coefficient alpha20a 0 1/K

armature inductance 0.0015 H

armature nominal temperature TaNominal 20 °C

armature operational temperature TaOperational 20 °C

Armature resistance resp. inductance include resistance resp. inductance of commutating pole winding and compensation windig, if present.

Extends from Machines.Interfaces.PartialBasicDCMachine (Partial model for DC machine).

Parameters

Type	Name	Default	Description
Inertia	Jr	Jr(start=0.15)	Rotor's moment of inertia [kg.m2]
Boolean	useSupport	false	Enable / disable (=fixed stator) support
Inertia	Js		Stator's moment of inertia [kg.m2]
Boolean	useThermalPort	false	Enable / disable (=fixed temperatures) thermal port
Operational temperatures
Temperature	TaOperational		Operational armature temperature [K]
Nominal parameters
Voltage	VaNominal		Nominal armature voltage [V]
Current	IaNominal		Nominal armature current (>0..Motor, <0..Generator) [A]
AngularVelocity	wNominal		Nominal speed [rad/s]
Temperature	TaNominal		Nominal armature temperature [K]
Nominal resistances and inductances
Resistance	Ra		Armature resistance at TRef [Ohm]
Temperature	TaRef		Reference temperature of armature resistance [K]
LinearTemperatureCoefficient20	alpha20a		Temperature coefficient of armature resistance [1/K]
Inductance	La		Armature inductance [H]
Losses
FrictionParameters	frictionParameters	frictionParameters(wRef=wNom...	Friction losses
CoreParameters	coreParameters		Armature core losses
StrayLoadParameters	strayLoadParameters		Stray load losses
BrushParameters	brushParameters		Brush losses

Connectors

Type Name Description

Flange_a flange Shaft

Flange_a support Support at which the reaction torque is acting

PositivePin pin_ap Positive armature pin

NegativePin pin_an Negative armature pin

Type	Name	Description
Flange_a	flange	Shaft
Flange_a	support	Support at which the reaction torque is acting
PositivePin	pin_ap	Positive armature pin
NegativePin	pin_an	Negative armature pin

Modelica definition

model DC_PermanentMagnet "Permanent magnet DC machine"
  extends Machines.Interfaces.PartialBasicDCMachine(
    final ViNominal = VaNominal - Machines.Thermal.convertResistance(Ra,TaRef,alpha20a,TaNominal)*IaNominal
                                - Machines.Losses.DCMachines.brushVoltageDrop(brushParameters, IaNominal),
    final psi_eNominal = Lme*IeNominal,
    redeclare final Machines.Thermal.DCMachines.ThermalAmbientDCPM
      thermalAmbient(final Tpm=TpmOperational),
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCPM
      thermalPort,
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCPM
      internalThermalPort,
    redeclare final Machines.Interfaces.DCMachines.PowerBalanceDCPM
      powerBalance(final lossPowerPermanentMagnet = 0),
    core(final w=airGapDC.w));
  final parameter Modelica.SIunits.Temperature TpmOperational=293.15 
    "Operational temperature of permanent magnet";
  Machines.BasicMachines.Components.AirGapDC airGapDC(
    final turnsRatio=turnsRatio,
    final Le=Lme,
    final quasiStationary=quasiStationary);
  Modelica.Electrical.Analog.Basic.Ground eGround;
  Modelica.Electrical.Analog.Sources.ConstantCurrent ie(I=IeNominal);
protected 
  constant Modelica.SIunits.Inductance Lme=1 "Field excitation inductance";
  constant Modelica.SIunits.Current IeNominal=1 "Equivalent excitation current";
equation 
  connect(eGround.p, ie.p);
  connect(airGapDC.pin_ep, ie.n);
  connect(airGapDC.pin_en, eGround.p);
  connect(airGapDC.pin_ap, la.n);
  connect(airGapDC.support, internalSupport);

  connect(airGapDC.flange, inertiaRotor.flange_a);
  connect(airGapDC.pin_an, brush.p);

end DC_PermanentMagnet;

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_ElectricalExcited

Electrical shunt/separate excited linear DC machine

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_ElectricalExcited

Information

Model of a DC Machine with electrical shunt or separate excitation.
Armature resistance and inductance are modeled directly after the armature pins, then using a AirGapDC model.
The machine models take the following loss effects into account:

heat losses in the temperature dependent armature winding resistance
heat losses in the temperature dependent excitation winding resistance
brush losses in the armature circuit
friction losses
core losses (only eddy current losses, no hysteresis losses)
stray load losses

No saturation is modelled.
Shunt or separate excitation is defined by the user's external circuit.
Default values for machine's parameters (a realistic example) are:

stator's moment of inertia 0.29 kg.m2

rotor's moment of inertia 0.15 kg.m2

nominal armature voltage 100 V

nominal armature current 100 A

nominal torque 63.66 Nm

nominal speed 1425 rpm

nominal mechanical output 9.5 kW

efficiency 95.0 % only armature

efficiency 94.06 % including excitation

armature resistance 0.05 Ohm at reference temperature

reference temperature TaRef 20 °C

temperature coefficient alpha20a 0 1/K

armature inductance 0.0015 H

nominal excitation voltage 100 V

nominal excitation current 1 A

excitation resistance 100 Ohm at reference temperature

reference temperature TeRef 20 °C

temperature coefficient alpha20e 0 1/K

excitation inductance 1 H

stray part of excitation inductance 0

armature nominal temperature TaNominal 20 °C

armature operational temperature TaOperational 20 °C

(shunt) excitation operational temperature TeOperational 20 °C

Armature resistance resp. inductance include resistance resp. inductance of commutating pole winding and compensation windig, if present.
Armature current does not cover excitation current of a shunt excitation; in this case total current drawn from the grid = armature current + excitation current.

Extends from Machines.Interfaces.PartialBasicDCMachine (Partial model for DC machine).

Parameters

Type Name Default Description

Inertia Jr Jr(start=0.15) Rotor's moment of inertia [kg.m2]

Boolean useSupport false Enable / disable (=fixed stator) support

Inertia Js Stator's moment of inertia [kg.m2]

Boolean useThermalPort false Enable / disable (=fixed temperatures) thermal port

Operational temperatures

Temperature TaOperational Operational armature temperature [K]

Temperature TeOperational Operational (shunt) excitation temperature [K]

Nominal parameters

Voltage VaNominal Nominal armature voltage [V]

Current IaNominal Nominal armature current (>0..Motor, <0..Generator) [A]

AngularVelocity wNominal Nominal speed [rad/s]

Temperature TaNominal Nominal armature temperature [K]

Nominal resistances and inductances

Resistance Ra Armature resistance at TRef [Ohm]

Temperature TaRef Reference temperature of armature resistance [K]

LinearTemperatureCoefficient20 alpha20a Temperature coefficient of armature resistance [1/K]

Inductance La Armature inductance [H]

Losses

FrictionParameters frictionParameters frictionParameters(wRef=wNom... Friction losses

CoreParameters coreParameters Armature core losses

StrayLoadParameters strayLoadParameters Stray load losses

BrushParameters brushParameters Brush losses

Excitation

Current IeNominal Nominal excitation current [A]

Resistance Re Field excitation resistance at TRef [Ohm]

Temperature TeRef Reference temperature of excitation resistance [K]

LinearTemperatureCoefficient20 alpha20e Temperature coefficient of excitation resistance [1/K]

Inductance Le Total field excitation inductance [H]

Real sigmae Stray fraction of total excitation inductance

Type	Name	Default	Description
Inertia	Jr	Jr(start=0.15)	Rotor's moment of inertia [kg.m2]
Boolean	useSupport	false	Enable / disable (=fixed stator) support
Inertia	Js		Stator's moment of inertia [kg.m2]
Boolean	useThermalPort	false	Enable / disable (=fixed temperatures) thermal port
Operational temperatures
Temperature	TaOperational		Operational armature temperature [K]
Temperature	TeOperational		Operational (shunt) excitation temperature [K]
Nominal parameters
Voltage	VaNominal		Nominal armature voltage [V]
Current	IaNominal		Nominal armature current (>0..Motor, <0..Generator) [A]
AngularVelocity	wNominal		Nominal speed [rad/s]
Temperature	TaNominal		Nominal armature temperature [K]
Nominal resistances and inductances
Resistance	Ra		Armature resistance at TRef [Ohm]
Temperature	TaRef		Reference temperature of armature resistance [K]
LinearTemperatureCoefficient20	alpha20a		Temperature coefficient of armature resistance [1/K]
Inductance	La		Armature inductance [H]
Losses
FrictionParameters	frictionParameters	frictionParameters(wRef=wNom...	Friction losses
CoreParameters	coreParameters		Armature core losses
StrayLoadParameters	strayLoadParameters		Stray load losses
BrushParameters	brushParameters		Brush losses
Excitation
Current	IeNominal		Nominal excitation current [A]
Resistance	Re		Field excitation resistance at TRef [Ohm]
Temperature	TeRef		Reference temperature of excitation resistance [K]
LinearTemperatureCoefficient20	alpha20e		Temperature coefficient of excitation resistance [1/K]
Inductance	Le		Total field excitation inductance [H]
Real	sigmae		Stray fraction of total excitation inductance

Connectors

Type Name Description

Flange_a flange Shaft

Flange_a support Support at which the reaction torque is acting

PositivePin pin_ap Positive armature pin

NegativePin pin_an Negative armature pin

PositivePin pin_ep Positive excitation pin

NegativePin pin_en Negative excitation pin

Type	Name	Description
Flange_a	flange	Shaft
Flange_a	support	Support at which the reaction torque is acting
PositivePin	pin_ap	Positive armature pin
NegativePin	pin_an	Negative armature pin
PositivePin	pin_ep	Positive excitation pin
NegativePin	pin_en	Negative excitation pin

Modelica definition

model DC_ElectricalExcited 
  "Electrical shunt/separate excited linear DC machine"
  extends Machines.Interfaces.PartialBasicDCMachine(
    final ViNominal = VaNominal - Machines.Thermal.convertResistance(Ra,TaRef,alpha20a,TaNominal)*IaNominal
                                - Machines.Losses.DCMachines.brushVoltageDrop(brushParameters, IaNominal),
    final psi_eNominal = Lme*IeNominal,
    redeclare final Machines.Thermal.DCMachines.ThermalAmbientDCEE
      thermalAmbient(final Te=TeOperational),
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCEE
      thermalPort,
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCEE
      internalThermalPort,
    redeclare final Machines.Interfaces.DCMachines.PowerBalanceDCEE
      powerBalance(
        final powerExcitation = ve*ie,
        final lossPowerExcitation = -re.heatPort.Q_flow),
    core(final w=airGapDC.w));
  parameter Modelica.SIunits.Current IeNominal(start=1) 
    "Nominal excitation current";
  parameter Modelica.SIunits.Resistance Re(start=100) 
    "Field excitation resistance at TRef";
  parameter Modelica.SIunits.Temperature TeRef(start=293.15) 
    "Reference temperature of excitation resistance";
  parameter Machines.Thermal.LinearTemperatureCoefficient20 alpha20e(
    start=0) "Temperature coefficient of excitation resistance";
  parameter Modelica.SIunits.Inductance Le(start=1) 
    "Total field excitation inductance";
  parameter Real sigmae(min=0, max=0.99, start=0) 
    "Stray fraction of total excitation inductance";
  parameter Modelica.SIunits.Temperature TeOperational(start=293.15) 
    "Operational (shunt) excitation temperature";
  output Modelica.SIunits.Voltage ve = pin_ep.v-pin_en.v 
    "Field excitation voltage";
  output Modelica.SIunits.Current ie = pin_ep.i "Field excitation current";
  Machines.BasicMachines.Components.AirGapDC airGapDC(
    final turnsRatio=turnsRatio,
    final Le=Lme,
    final quasiStationary=quasiStationary);
  Modelica.Electrical.Analog.Basic.Ground ground;
 Machines.BasicMachines.Components.CompoundDCExcitation compoundDCExcitation(final excitationTurnsRatio=
                           1);
  Modelica.Electrical.Analog.Basic.Ground groundSE;

  Modelica.Electrical.Analog.Basic.Resistor re(
    final R=Re,
    final T_ref=TeRef,
    final alpha=Machines.Thermal.convertAlpha(alpha20e, TeRef),
    final useHeatPort=true,
    final T=TeRef);
 Machines.BasicMachines.Components.InductorDC lesigma(final L=Lesigma, final quasiStationary=
        quasiStationary);
  Modelica.Electrical.Analog.Interfaces.PositivePin pin_ep 
    "Positive excitation pin";
  Modelica.Electrical.Analog.Interfaces.NegativePin pin_en 
    "Negative excitation pin";
protected 
  final parameter Modelica.SIunits.Inductance Lme = Le*(1 - sigmae) 
    "Main part of excitation inductance";
  final parameter Modelica.SIunits.Inductance Lesigma = Le*sigmae 
    "Stray part of excitation inductance";
equation 
  connect(airGapDC.pin_ap, la.n);
  connect(airGapDC.support, internalSupport);
  connect(airGapDC.flange, inertiaRotor.flange_a);
  connect(re.p, pin_ep);
  connect(re.n, lesigma.p);
  connect(ground.p, airGapDC.pin_en);
  connect(airGapDC.pin_en, compoundDCExcitation.pin_n);
  connect(airGapDC.pin_ep, compoundDCExcitation.pin_p);
  connect(groundSE.p, compoundDCExcitation.pin_sen);
  connect(pin_en, compoundDCExcitation.pin_en);
  connect(compoundDCExcitation.pin_ep, lesigma.n);
  connect(airGapDC.pin_an, brush.p);
  connect(re.heatPort, internalThermalPort.heatPortExcitation);
end DC_ElectricalExcited;

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_SeriesExcited

Series excited linear DC machine

Modelica.Electrical.Machines.BasicMachines.DCMachines.DC_SeriesExcited

Information

Model of a DC Machine with series excitation.
Armature resistance and inductance are modeled directly after the armature pins, then using a AirGapDC model.
The machine models take the following loss effects into account:

heat losses in the temperature dependent armature winding resistance
heat losses in the temperature dependent excitation winding resistance
brush losses in the armature circuit
friction losses
core losses (only eddy current losses, no hysteresis losses)
stray load losses

No saturation is modelled.
Series excitation has to be connected by the user's external circuit.
Default values for machine's parameters (a realistic example) are:

stator's moment of inertia 0.29 kg.m2

rotor's moment of inertia 0.15 kg.m2

nominal armature voltage 100 V

nominal armature current 100 A

nominal torque 63.66 Nm

nominal speed 1410 rpm

nominal mechanical output 9.4 kW

efficiency 94.0 % only armature

armature resistance 0.05 Ohm at reference temperature

reference temperature TaRef 20 °C

temperature coefficient alpha20a 0 1/K

armature inductance 0.0015 H

excitation resistance 0.01 Ohm at reference temperature

reference temperature TeRef 20 °C

temperature coefficient alpha20e 0 1/K

excitation inductance 0.0005 H

stray part of excitation inductance 0

armature nominal temperature TaNominal 20 °C

series excitation nominal temperature TeNominal 20 °C

armature operational temperature TaOperational 20 °C

series excitation operational temperature TeOperational 20 °C

Armature resistance resp. inductance include resistance resp. inductance of commutating pole winding and compensation windig, if present.
Parameter nominal armature voltage includes voltage drop of series excitation;
but for output the voltage is splitted into:
va = armature voltage without voltage drop of series excitation
ve = voltage drop of series excitation

Extends from Machines.Interfaces.PartialBasicDCMachine (Partial model for DC machine).

Parameters

Type Name Default Description

Inertia Jr Jr(start=0.15) Rotor's moment of inertia [kg.m2]

Boolean useSupport false Enable / disable (=fixed stator) support

Inertia Js Stator's moment of inertia [kg.m2]

Boolean useThermalPort false Enable / disable (=fixed temperatures) thermal port

Operational temperatures

Temperature TaOperational Operational armature temperature [K]

Temperature TeOperational Operational series excitation temperature [K]

Nominal parameters

Voltage VaNominal Nominal armature voltage [V]

Current IaNominal Nominal armature current (>0..Motor, <0..Generator) [A]

AngularVelocity wNominal.start 1410*2*pi/60 Nominal speed [rad/s]

Temperature TaNominal Nominal armature temperature [K]

Temperature TeNominal Nominal series excitation temperature [K]

Nominal resistances and inductances

Resistance Ra Armature resistance at TRef [Ohm]

Temperature TaRef Reference temperature of armature resistance [K]

LinearTemperatureCoefficient20 alpha20a Temperature coefficient of armature resistance [1/K]

Inductance La Armature inductance [H]

Losses

FrictionParameters frictionParameters frictionParameters(wRef=wNom... Friction losses

CoreParameters coreParameters Armature core losses

StrayLoadParameters strayLoadParameters Stray load losses

BrushParameters brushParameters Brush losses

Excitation

Resistance Re Series excitation resistance at TRef [Ohm]

Temperature TeRef Reference temperature of excitation resistance [K]

LinearTemperatureCoefficient20 alpha20e Temperature coefficient of excitation resistance [1/K]

Inductance Le Total field excitation inductance [H]

Real sigmae Stray fraction of total excitation inductance

Type	Name	Default	Description
Inertia	Jr	Jr(start=0.15)	Rotor's moment of inertia [kg.m2]
Boolean	useSupport	false	Enable / disable (=fixed stator) support
Inertia	Js		Stator's moment of inertia [kg.m2]
Boolean	useThermalPort	false	Enable / disable (=fixed temperatures) thermal port
Operational temperatures
Temperature	TaOperational		Operational armature temperature [K]
Temperature	TeOperational		Operational series excitation temperature [K]
Nominal parameters
Voltage	VaNominal		Nominal armature voltage [V]
Current	IaNominal		Nominal armature current (>0..Motor, <0..Generator) [A]
AngularVelocity	wNominal.start	14102pi/60	Nominal speed [rad/s]
Temperature	TaNominal		Nominal armature temperature [K]
Temperature	TeNominal		Nominal series excitation temperature [K]
Nominal resistances and inductances
Resistance	Ra		Armature resistance at TRef [Ohm]
Temperature	TaRef		Reference temperature of armature resistance [K]
LinearTemperatureCoefficient20	alpha20a		Temperature coefficient of armature resistance [1/K]
Inductance	La		Armature inductance [H]
Losses
FrictionParameters	frictionParameters	frictionParameters(wRef=wNom...	Friction losses
CoreParameters	coreParameters		Armature core losses
StrayLoadParameters	strayLoadParameters		Stray load losses
BrushParameters	brushParameters		Brush losses
Excitation
Resistance	Re		Series excitation resistance at TRef [Ohm]
Temperature	TeRef		Reference temperature of excitation resistance [K]
LinearTemperatureCoefficient20	alpha20e		Temperature coefficient of excitation resistance [1/K]
Inductance	Le		Total field excitation inductance [H]
Real	sigmae		Stray fraction of total excitation inductance

Connectors

Type Name Description

Flange_a flange Shaft

Flange_a support Support at which the reaction torque is acting

PositivePin pin_ap Positive armature pin

NegativePin pin_an Negative armature pin

PositivePin pin_ep Positive series excitation pin

NegativePin pin_en Negative series excitation pin

Type	Name	Description
Flange_a	flange	Shaft
Flange_a	support	Support at which the reaction torque is acting
PositivePin	pin_ap	Positive armature pin
NegativePin	pin_an	Negative armature pin
PositivePin	pin_ep	Positive series excitation pin
NegativePin	pin_en	Negative series excitation pin

Modelica definition

model DC_SeriesExcited "Series excited linear DC machine"
  extends Machines.Interfaces.PartialBasicDCMachine(wNominal(start=1410*2*pi/60),
    final ViNominal = VaNominal - (Machines.Thermal.convertResistance(Ra,TaRef,alpha20a,TaNominal) +
                                   Machines.Thermal.convertResistance(Re,TeRef,alpha20e,TeNominal))*IaNominal
                                - Machines.Losses.DCMachines.brushVoltageDrop(brushParameters, IaNominal),
    final psi_eNominal = Lme*abs(IaNominal),
    redeclare final Machines.Thermal.DCMachines.ThermalAmbientDCSE
      thermalAmbient(final Tse=TeOperational),
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCSE
      thermalPort,
    redeclare final Machines.Interfaces.DCMachines.ThermalPortDCSE
      internalThermalPort,
    redeclare final Machines.Interfaces.DCMachines.PowerBalanceDCSE
      powerBalance(
        final powerSeriesExcitation = ve*ie,
        final lossPowerSeriesExcitation = -re.heatPort.Q_flow),
    core(final w=airGapDC.w));
  parameter Modelica.SIunits.Resistance Re(start=0.01) 
    "Series excitation resistance at TRef";
  parameter Modelica.SIunits.Temperature TeRef(start=293.15) 
    "Reference temperature of excitation resistance";
  parameter Machines.Thermal.LinearTemperatureCoefficient20 alpha20e(
    start=0) "Temperature coefficient of excitation resistance";
  parameter Modelica.SIunits.Inductance Le(start=0.0005) 
    "Total field excitation inductance";
  parameter Real sigmae(min=0, max=0.99, start=0) 
    "Stray fraction of total excitation inductance";
  parameter Modelica.SIunits.Temperature TeNominal(start=293.15) 
    "Nominal series excitation temperature";
  parameter Modelica.SIunits.Temperature TeOperational(start=293.15) 
    "Operational series excitation temperature";
  output Modelica.SIunits.Voltage ve = pin_ep.v-pin_en.v 
    "Field excitation voltage";
  output Modelica.SIunits.Current ie = pin_ep.i "Field excitation current";
  Machines.BasicMachines.Components.AirGapDC airGapDC(
    final turnsRatio=turnsRatio,
    final Le=Lme,
    final quasiStationary=quasiStationary);
 Machines.BasicMachines.Components.CompoundDCExcitation compoundDCExcitation(final excitationTurnsRatio=
                           1);
  Modelica.Electrical.Analog.Basic.Ground ground;
  Modelica.Electrical.Analog.Basic.Ground groundE;
  Modelica.Electrical.Analog.Basic.Resistor re(
    final R=Re,
    final T_ref=TeRef,
    final alpha=Machines.Thermal.convertAlpha(alpha20e, TeRef),
    final useHeatPort=true,
    final T=TeRef);
 Machines.BasicMachines.Components.InductorDC lesigma(final L=Lesigma, final quasiStationary=
        quasiStationary);
  Modelica.Electrical.Analog.Interfaces.PositivePin pin_ep 
    "Positive series excitation pin";
  Modelica.Electrical.Analog.Interfaces.NegativePin pin_en 
    "Negative series excitation pin";
protected 
  final parameter Modelica.SIunits.Inductance Lme = Le*(1 - sigmae) 
    "Main part of excitation inductance";
  final parameter Modelica.SIunits.Inductance Lesigma = Le*sigmae 
    "Stray part of excitation inductance";
equation 
  connect(airGapDC.pin_ap, la.n);
  connect(airGapDC.support, internalSupport);
  connect(airGapDC.flange, inertiaRotor.flange_a);
  connect(pin_ep, re.p);
  connect(re.n, lesigma.p);
  connect(airGapDC.pin_en, compoundDCExcitation.pin_n);
  connect(compoundDCExcitation.pin_p, airGapDC.pin_ep);
  connect(airGapDC.pin_en, ground.p);
  connect(compoundDCExcitation.pin_sen, pin_en);
  connect(compoundDCExcitation.pin_sep, lesigma.n);
  connect(compoundDCExcitation.pin_en, groundE.p);
  connect(airGapDC.pin_an, brush.p);

  connect(re.heatPort, internalThermalPort.heatPortSeriesExcitation);
end DC_SeriesExcited;

Automatically generated Fri Nov 12 16:28:46 2010.

stator's moment of inertia	0.29	kg.m2
rotor's moment of inertia	0.15	kg.m2
nominal armature voltage	100	V
nominal armature current	100	A
nominal speed	1425	rpm
nominal torque	63.66	Nm
nominal mechanical output	9.5	kW
efficiency	95.0	%
armature resistance	0.05	Ohm at reference temperature
reference temperature TaRef	20	°C
temperature coefficient alpha20a	0	1/K
armature inductance	0.0015	H
armature nominal temperature TaNominal	20	°C
armature operational temperature TaOperational	20	°C